Circuit-changing mechanism.



H. G. WEBSTER.

.UIRGUIT CHANGING MEGHANISM.

APPLICATION FILED JULY5, 1906.

y 1,656,866, Patented Mar. 1913.

Unrrnn s'rATs Parana" OFFICE.

'IARRY G5 WEBSTER, 0F CHICGG, ILLINOIS, ASSIGNGR, BY MESNE ASSIGNMENTS, T0 KELLOGG SWITCHBOAED 6L SUPILY COMPANY, A CORPORATION OF ILLINOIS.

CIRCUIT-CHANGING MECI-IANISM.

Specication of Letters Eatent.

Application led July E5, i908. Serial No. 32e-,8%.

My invention` relates to circuit changing" apparatus, and particularly to that class known asc relays, in Which the armature of. an electromagnetic associated with and controls electrical circuit changing connections.

.The object-of my invention is the provi- .sion of improved means whereby the movement of the armature of the electromagnet Will "cause one set oft circuit connections when the relay magnet is energized by'moinentary current impulses, and another set vof circuit connections when the winding is energized by' prolonged impulses or steady currents.

In accordance with my invention, I asso-i ciate With the electromagnet an armature having relatively slight inertia or mass, adapted, by its motion, to engage Aavmovalole member or stop having relatively great inertia. When the magnet is energized by a momentaryk flow ot' current, the armature en gages the `inoving stop and comes to rest Without completing its stroke, the force of thestroke being taken up by theinertia of the stop. vWhen. the magnet is energized by a prolonged current, the stopv isengaged by the armature in its torwardstroke and carried with it in its further attraction toward the pole piece of the magnet. The armature and the stop may be utilized as, or associl ated with, contactpieces or springs to sef a: provided with a Winding y and a polar extension p or" magnetic material. Adjacent Patented Mar. 25, 1913.

to the end of the core w, and hinged to the n part y: 'by the pivot la, is an armature e, which is of relatively light Weight and normally retracted against the contact-stop g by the spring j. rihis stop and spring are carried by the part b which is preferably of non-magnetic material and is secured to the extension p by the screw m. Associated with the armature e is a moving member c, hinged also upon the pivot la and preferably of non-magnetic material. This part c is ofV relatively great Weight and stiffness and the inertia of the part is further increased by the Weight d secured thereto. Attached to the upper end of the part c is an insulated contact-piece y, normally -resting against the contact-stop it and forming, in connection with the part c and Weight d, amovable stop for the armature. When the relay magnet is energized by momentary currents, the armature 1.vill engage the part f at each impulse, but owing to the relative inertia of the armature and stop, its motion Will be arrested at this point. In the structure' shown, this actuation will serve to interri'ip't an electrical connection between armature e and contactstop g and to establish a new electrical con nection from armature e to contactepiece j which is normally in connection with contact-stop fr. .lf the relay magnet be energized by prolonged current impulses, or by a steady current, this energization Will be sufficient to overcome the inertia of the' mov able stop which Will be carried with the armature to its completely attracted position. The actuation thus described serves to break the electrical connections normally existing between armature e and stop g and between contact-piece f and stop it and to bring into connection armature e, contact-piece f and stop c'. These or other changes in the electrical'connection may be utlized for a variety of purposes. f

Fig. 2 is an end view of the relay with the .part Z) removed. It will be evident from this figure that .the pivot 7c is carried by projecting lugs on the polar extension p; that the armature e is provided with extensions in movable relation onthespivot 7c next t0 these lugs; and that the part c is provided with similar extensionsadjacent to the armature extensions, also hinging it to the pivot It'.

Fig. 3 is a diagram illustrating the ape plication of my invention to a time servicev system. In this figure, H indicates a circuitcontrolling device associated with a masterclocl. In this device, the Wiper 2 moves at regular inter 7als over the projections of the ring 3 and, at each movement, establishes a temporary circuit ot` battery A through the winding of relay M. This circuit is or but momentary duration except when the Wiper passes over the broad projection el, at which time a prolonged energization of the relay magnet ensues. An electrically operated clock is diagrammatically indicated at E. This clock is provided with an escapement 9, controlled by electromagnet 5, and with a 'Winding-drum 10, controlled by electromagnet 6. In the operation of the structure, the Wiper 2, being given a step-by-step motion by the master-clock mechanism, establishes at each step a momentary circuit for relay M as previously described. At each current pulsation, the armature e is attracted ysuliiciently to engage the contact-piece j' carried by the movable stop c, but is not attracted to a point Where the contacte' Will 4be engaged. At eachimpul'sdtheretore,a circuit of battery B is closed through magnet causing the attraction-.of its armature S, and the retraction of the armature e breaks the circuit. The consequent retraction of armaturel8 of magnet 5 allows the escapementwheel to progress one tooth, the progression being upon the release ot themagnet 'armature. This action takes place at every stepv of the Wiper 2, except vvvhen the broadpro- .jection 4 is reached. When the wiper passes over this projection 4, a prolonged current impulse is sent Whichserves to cause the complete 'attraction of armature c. When this occurs, armature 8 of magnet 5 is attracted as before, and a circuit is likevvise'established through Wire 5l, Wire 52 and magnet 6 at contact Armature 7 of magnet 6 -is provided with an extension engaging the winding mechanism 10 of the clock, and the attraction of armature 7, in response to current in the circuit liust traced, serves to Wind i the driving springot the clock at the required time. The subsequent denergization ofthe magnet of relay M, which occurs When the wiper 2 passes'out O15-engagement with` projection 4 and comes to rest, opens the circuit of magnets 5 and 6,. releasing the escapement 9 at'the proper time interval and allowing-armature 7 and its associated parts to assume their normal positions.

Vhile I have illustrated my invention as embodied in particular forms of mechanical construction, it is obvious thatl many Inediti.- cations or other forms ot constructions may be used without departing from its spirit. It is also bbvious that such'a relay or circuit-changing device may "be utilized in many other structures than thoseshown. I therefore do not Wish to be limited-to the particular applications and the particular structures illustrated and described, but claim:

l. Circuit changing mechanism comprising an clectromagnet, a polepiece thert-Ytor, an armature carried by said pole piece, a movable stop for said armature, carried by said pele piece and' operative to arrest the motion of said armature in response to a momentary energization of said electromagnet and to move with said armature in response to a prolonged energization of the electromagnet, contact pieces associated With said armature and .said stop, and means for giving said electromagnet momentary and prolonged energization.

2. Circuit changing mechanism comprising an electromagnet, a pole piecel therefor, an' armature carried by said pole piece, a relatively heavier movable stop for said armature, also carried by said pole piece and operative to arrest the motion of said armature in response to a momentary energization of said electromagnet and to move with said armature in response to a prolonged energization of the electromagnet, contactA pieces associated with said armature and said stop, and means for giving said electromagnet momentary and prolonged energize.- tion.

Circuit changing mechanism comprising an electromagnet, a pole piece therefor,

an armature carried by said pole piece, a movable stop for said armature also carried by said pole piece, means for affecting said stop to arrest the motion of said armature in response to a momentary energization of said electromagnet, said stop being adapted to move with said armature in response to a prolonged energization of the electromagnet, contact pieces associated with said electromagnet, and means tor giving lsaid electromagnet momentary and prolonged energizations.

t. Circuit changing mechanism comprising an electromagnet, a pole piece extension therefor, a Hat armature pivoted to said extension and vextending adjacent to 'the core of said electromagnet, a movable stop for said armature also pivoted to'said extension, means 'fo-r affecting said stop to arrest the motion of said armature in response to a momentary energization of said electromagnet, said stop being adapted to'move with said armature in response to a prolonged energi'zation of the electromagnet, Contact pieces associated -vvithsaid electromagnet, and means for giv- `'the path of motion of said armature, said weeen@ moving member operating to engage said tromagnet ley-momentary and more than armature and to stop its motion when the momentary currents. lo eleotromagnet is energized by momentary In Witness whereof, I hereunto subscribe currents and to move with said armature my name this 2nd day of July 1906.

when the eleotromagnet- 'is energized by more HARRY G. WEBSTER. than momentary currents, circuit connections VineSSeS: A controlled by said armature and moving GEO. E. MUELLER,

member, and means for energizing said eleo- A. H. DYSON. 

